Something that can be seen and is perceptible to the eye
Visible
The angle between an object's rotational axis and its orbital axis
Axial Tilt
Things that are arranged following a rule or rules
Pattern
To move in a circular course or orbit
Revolve
Star: Huge spheres of hot glowing _________.
Gas
Lightyear is...
How far light travels in one year (about 6 trillion miles)
One of the four periods of the year varied by location: summer, autumn, winter, spring
Seasons
The sun together with all the planets and other bodies that revolve around it
Solar System
To turn around on or as if on an axis
Rotate
Orbits the sun, is nearly round, and has an orbit free of other objects
Planet
An enormous collection of gas, dust, and billions of stars held together by gravity
Galaxy
Definition of hemisphere is...
Half of a sphere
Constellation is a _______ of ______ that have been given a name.
group of stars
To move or travel around an object is called...
Orbit
An optical instrument for making distant objects appear larger and nearer
Telescope